CVS Series 50 Chemical Injection Pump

Introduction

The CVS Series 50 Chemical Injection Pump is a positive displacement pump that uses a molded diaphragm to drive a piston through packing in the fluid end. The pump capabilities cover a broad range of applications due to the ability to achieve high discharge pressures (up to 12000 psi) and a wide volume range. High operating efficiency is met by the horizontal plunger and vertical valve check arrangement. The standard fluid end is ductile iron with stainless steel trim and plunger. The pump body casting and frame are high strength aluminum to make it light weight. Integrated priming valve enables the operator to easily check operation of the pump. All CVS series 50 chemical injection pump models are furnished with a micro switch that pilots a high volume pneumatic valve. Operating mechanism is gasket sealed to protect from the environmental elements. Safety valve provides for protection on case of accidental overpressure of the main diaphragm. A grease jack for lubricating the plunger and packing ring, along with adjustable packing equipped with lantern ring insure long life.

Applications

• Methanol and alcohol injection in gas systems to prevent freezing

• Water Treatment • The introduction of De-emulsifiers,

corrosion inhibitors, De-scaling agents • High and low pressure lubrication

systems • High pressure addition of fluid

compounds in chemical processing and blending

• Injection of Surfactant (soap) in wells with high water content

Instruction Manual

Head Office 3900 101 Street Edmonton, Alberta T6E 0A5 Canada Office: (780) 437-3055

Website: www.cvs-controls.com Email: info@cvs-controls.com

Figure 1: CVS Series 50 Chemical Injection Pump

Calgary Sales Office 205,2323 – 32 Avenue NE Calgary, Alberta T2E 6Z3 Canada Office: (403) 250-1416

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Installation and Operation

- Upon removing the pump from carton, inspect for possible damaged or missing components from transit from CVS Controls. Contact a CVS controls representative should there be any concerns.

- Blow out and remove potential debris from supply line before hooking up supply air/gas to inlet. Supply pressure should be regulated with a maximum setting of 50 psi.

- Connect suction line to pump head.

- A line check should be installed in the discharge line close to the point of injection. (note the direction of the flow arrow) CVS Controls offers the CVS-B-0283 line check in stainless steel, for all plunger sizes which will withstand a working pressure of 6000 psi.

- Connect the discharge line to the ¼” FNPT in both the line check and the Top Bushing (CVS-A-0152) of the head assembly. Ensure the line is clear of all debris.

- Partially open Bleeder Valve (CVS-A-0123)

- Connect the gas supply line, considering the pressure required of the pump. If the gas exceeds 50 psi, the supply should be equipped with a regulator to reduce the pressure to 50 psi.

Lubrication

A stick lubricator (CVS-A-3179) is inserted into the grease assembly (CVS-A-0558) upon manufacturing. CVS controls has available and recommends CVS-A-3179 for most fluids. No lubrication stick is required if the pump is equipped with Teflon packing and chrome plated plunger.

Operation

1. Remove the body cover (CVS-B-0004) and cover gasket (CVS-B-0036)

2. Open the main air/gas supply valve and slowly open the exhaust valve (CVS-A-2489). The pump should automatically start. Ensure the suction line is primed with fluid, and then test the pump head by opening the Bleeder Valve (CVS-A-0123). The fluid escaping from the bleeder valve may contain bubbles. As soon as the bubbles subside, close the bleeder valve for normal operation.

3. Adjust for desired volume by considering pump speed using the flow control. Consider the position of Brass Adjusting Pin (CVS-A-0035)to adjust stroke.

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Operation Continued,

4. Refer to Technical Data for volumes

achieved by long and short stroke settings. The pump is assembled with the adjusting pin inserted in the hole of the plunger, nearest the plunger packing gland nut. This is the position of the longest stroke. To shorten stroke place the brass adjusting pin in the other hole.

5. Check the packing gland for leakage. If leakage is occurring, use a flathead screwdriver to tighten the Gland Nut until leak just stops. Do not over tighten the gland nut. This may stall the pump or generate excessive wear on the packing and/ or plunger. Do not adjust packing under pressure.

Note: If low volumes are being pumped, the pump head, fluid discharge line, and all other fittings up to the line check should be thoroughly purged of all air bubbles.

6. Replace cover gasket and body cover, secure with wing screw.

Maintenance and Troubleshooting

- Keep the cover in place and periodically oil the thrust rod.

- Regularly check packing for leaks, tighten or replace as required.

*NOTE: Ensure the plunger packing is not over tightened. This may score the plunger and decrease the lifespan of the packing.

- CVS chemical pumps used for alcohol or methanol injection must be fitted with Buna-N o-rings. Pumps used for most chemical injection should be fitted with Viton o-rings. The o-rings are located in the Top Check Valve Seat (CVS-B-0368), and the Bottom Check Valve Seat (CVS-B-0698). Refer to manufacturer specifications for elastomer sealing fluid compatibilities.

- If the pump fails to stroke, and air/gas constantly flows from the exhaust, the diaphragm may be ruptured. Disconnect air supply and bleed off pressure. Remove the cover (CVS-C-0001), and inspect main Diaphragm (CVS-B-0010) for rips and tears. Replace as required. See below for diaphragm replacement procedures.

Diaphragm Replacement

*NOTE: If installing new diaphragm, shutoff and disconnect air/gas supply and ensure the pressure has been bled off.

- Remove Wing Screw (22), Body Cover (26), and Cover Gasket (28)

- Insert a punch or screwdriver into the forward slot of the thrust rod containing the roll pin, this will prevent the rod from shooting out of the body. Pry the thrust rod back and secure by resting the punch/screwdriver at the bottom of the pump body. At this point visually inspect the return spring (6) for damage.

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Diaphragm Replacement Continued,

- Remove Connecting Pipe I (1/4” tubing) and Connecting Pipe II (3/8” tubing)

- Remove sixteen 5/16 fasteners (16, 20)that secure the Cover (30) to the Housing (35)

- Lay cover face down and remove two Main Diaphragms (27)

Replace Main Diaphragms as required, re assemble in reverse order that it was disassembled.

Maintenance and Troubleshooting continued,

- If no air/gas venting, check the supply pressure (50 psi max). Erratic changes in pressure may cause the pump to stall.

- If pump stalls in the forward discharge position, shut off the air/gas supply. Check if the packing gland nut is over tightened. Re-adjust packing as required.

- If the pump is running, but not pumping, the injection head could be air locked. Open the priming valve and bleed fluid until no bubbles are present. If still not pumping, the bottom seat of the injection head may have failed and needs replacing.

- A constant fluctuation in down line pressure may indicate a top seat failure of the injection head and needs replacing.

Micro Switch Replacement

If Micro Switch (CVS-MV-004) needs replacement, shutoff air/gas supply ensuring all pressure is bled off. Disconnect supply and output tubing. Remove 5/16 bolts (CVS-A-0143) that secure the micro switch to the pump body. Remove the micro switch with plate (CVS-MV-0014) and separate. Mount a new micro switch to the micro valve switch plate, and secure assembly to body. Ensure the micro switch extension is centered between both trip arms on trip bar assembly.

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Technical Data: Performance

Maximum Discharge Maximum Volume Maximum VolumeModel Plunger Operating Ratio (PSIG)

Number Size Gas to Fluid Soft HardPacking Packing

50-14-DMV 1/4 1000:1 3000 12,000 0.67 16 0.83 2050-38-DMV 3/8 500:1 3000 12,000 1.8 43 2.33 5650-12-DMV 1/2 265:1 3000 12,000 3.55 85 4.38 10550-34-DMV 3/4 115:1 3000 5000 6.67 160 7.42 19050-1-DMV 1 65:1 3000 N/A 13.33 320 16.66 400

50-114-DMV 1-1/4 42:1 2000 N/A 20.83 500 26.04 625 A. Maximum Power Gas Pressure: 50 PSI

B. Stroke Length: Long- 1-1/4", Short- 1/2"

C. Specify an inlet regulator and guage when the inlet pressure is over 50 PSI

Continuous Intermittent

GPH GPDGPH GPD

Gas Consumption

Gas Consumption Chart (Standard Cubic Feet of gas required to pump one gallon)Injection Pressure 50 100 150 200 250 300 400 500 600 700 800 900 1000 1500 2000 3000 3500 4000 5000 6000 7000 8000 9000 10000

PSI1/4" Short Stroke 700 703 706 707 709 712 720 724 731 737 740 748 756 779 802 854 872 897 937 984 1017 1057 1090 11221/4" Long Stroke 280 281 282 284 285 286 289 292 295 297 300 303 306 318 330 356 368 380 404 428 454 476 500 5223/8" Short Stroke 355 356 356 357 357 358 360 361 362 364 365 367 368 374 380 393 399 405 417 429 441 453 465 4773/8" Long Stroke 140 141 141 142 142 143 145 146 147 149 150 152 153 159 165 178 184 190 202 214 226 238 250 2621/2" Short Stroke 201 201 201 202 203 204 205 206 207 208 210 211 212 218 224 236 242 248 260 272 284 296 308 3201/2" Long Stroke 81 81.2 81.8 82.4 83 84 85 86 87.2 88.4 90 90.8 92 98 104 116 122 128 140 152 164 176 188 2003/4" Short Stroke 89 91 92 94 95 96 99 101 105 109 111 113 117 132 145 172 183 190 1913/4" Long Stroke 36 37 38 39 40 41 43 45 47.5 49.5 51.5 53 56 66 76.5 97 107 114 2121" Short Stroke 51 51.2 52 53 53 54 55 56 57 58.5 59.8 61 62 68 74 861" Long Stroke 20.6 21.2 21.8 22.5 23 23.6 25 26 27.5 28.5 29.6 31 32 38 44 56 621-1/4" Short Stroke 32.6 33.2 33.8 34.5 35 35.6 36.8 38 39.2 40.4 41.6 42.8 44 50 561-1/4" Long Stroke 13.6 14.2 14.8 15.5 16 16.6 17.8 19.2 20.2 21.4 22.6 23.8 25 31 37 49

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CVS Series 50 Chemical Injection Pump – Assembly

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CVS Series 50 Chemical Injection Pump - Parts ListingItem Number Part Number Description QTY.

1 1/4" Tube Connecting Pipe I (1/4" Pipe) 12 3/8" Tube Connecting Pipe II (3/8" Pipe SCH40) 13 CVS-50-Trip Series 50 - Trip Bar Assembly 24 CVS-50MV-001 1/4" Nipple 2" Length 25 CVS-A-0009 Attachment Nipple (3/8") 16 CVS-A-0025 Spring 17 CVS-A-0035 Series 50 - Brass Adjusting Pin 18 CVS-A-0038 Series 50 - Stuffing Box 19 CVS-A-0041 Packing Nut 110 CVS-A-0075 90 Degree Elbow (1/4"M X 1/4" F) 111 CVS-A-0076 Series 50 - Bushing 112 CVS-A-0123 Bleeder Valve 113 CVS-A-0131 Safety Valve 114 CVS-A-0142 5/16-18UNC Hex Bolt, 1.5" Long 1615 CVS-A-0143 5/16-18UNC Hex Bolt 416 CVS-A-0143 5/16 Bolt 417 CVS-A-0143-1 3/8-16UNC Hex Bolt 418 CVS-A-0558 Grease Assembly 119 CVS-A-1034 1/4" Plug 220 CVS-A-139 5/16-18UNC Hex Nut 1621 CVS-A-2489 Exhaust Valve 122 CVS-A-2970 Wing Screw 123 CVS-A-4452 3/8" Hex Bolt 424 CVS-B-0002 Series 50 - Diaphragm Disc 125 CVS-B-0003 Series 50 - Thrust Rod 126 CVS-B-0004 Series 50 - Cover Body 127 CVS-B-0010 Main Diaphragm 228 CVS-B-0036 Cover Gasket 129 CVS-BF68.5 Air Filter 1/2" NPT Connection 130 CVS-C-0001 Cover 131 CVS-C-0001-1 1/4" Elbow 132 CVS-C-0004 Series 50 - Base Stand 133 CVS-C-0068 Injector Assembly 134 CVS-D-0071 Series 50 - Housing, Body 135 CVS-D-0434 Series 50 - Housing 136 CVS-MV-0014 Micro Valve Switch Plate 137 CVS-MV-0014-1 1/4" Hex Bolt 238 CVS-MV-0014-2 1/4" Spring Washer 239 CVS-MV-004 Micro Switch 140 CVS-MV-004-1 1/4" Female Tee 141 CVS-MV-006 90 Degree Elbow (1/4"FM X 3/8" T) 242 CVS-MV-007 3/8" to 1/4" NPT Reducer 443 CVS-MV-013 Socket Setting Screw #10-32 244 Male Connector Male Connector 1/8" NPT (M)X 1/4" T 145 Male Connector Male Connector 1/4" NPT (M)X 1/4" T 146 NVSA3135-03N Air Valve 147 CVS-B-0011 Diaphragm Casing Gasket 148 CVS 5000RC001 Regulator Vent Cover 1

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CVS Series 50 Chemical injection Pump – 1-1/4” Injector assembly

Item Number Part Number Description Qty.1 CVS-A-0053 Bottom Check Ball 1/2", 316SS 12 CVS-A-0054 Top Check Ball 3/8", 316SS 13 CVS-A-0077 Check Ball Spring, 316SS 14 CVS-A-0152 Series 50 - Top Bushing 15 CVS-A-0153 Series 50 - Bottom Bushing 16 CVS-A-0403 Series 50 - Packing Nut, 1-1/4" 17 CVS-A-0404 Series 50 1-1/4" Plunger Packing Gland 18 CVS-A-0405 Packing 19 CVS-A-0406 Series 50 - 1-1/4" Adapter 1

10 CVS-A-0408 Series 50 - 1-1/4" Plunger 111 CVS-A-0521 Gasket 112 CVS-A-0612 Injector Bottom o-ring 113 CVS-A-2097 Top o-ring 114 CVS-A-2338 Gasket 115 CVS-A-2350 Gasket 316 CVS-A-3523 Retainer Ring (.39" ID) 117 CVS-B-0368 Series 50 - Top Check Valve Seat 118 CVS-B-0698 Series 50 - Bottom Check Valve Seat 119 CVS-C-0049 Series 50 - Pump Head, 1/2" Stem 120 CVS-C-0444 Series 50 - Ball Cage 1

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CVS Series 50 Chemical Injection Pump – ¼” – 1” Plunger Injector and Grease Assembly

Item Number Part Number Description Qty.1 CVS-A-0053 Bottom Check Ball 1/2", 316SS 12 CVS-A-0054 Top Check Ball 3/8", 316SS 13 CVS-A-0055 Series 50 - Packing Nut, 1" 14 CVS-A-0077 Check Ball Spring, 316SS 15 CVS-A-0152 Series 50 - Top Bushing 16 CVS-A-0153 Series 50 - Bottom Bushing 17 CVS-A-2766 Series 50 - Lantern Ring, 1/4" 17a CVS-A-0742 Series 50 - Lantern Ring, 3/8" 17b CVS-A-0447 Series 50 - Lantern Ring, 1/2" 17c CVS-A-2770 Series 50 - Lantern Ring, 3/4" 17d CVS-A-0448 Series 50 - Lantern Ring, 1" 18 CVS-A-0612 Injector Bottom o-ring 19 CVS-A-1461 Packing, 1/4" - Buna 1

CVS-A-1642 Packing, 1/4" - Teflon 19a CVS-A-1456 Packing, 3/8" - Buna 1

CVS-A-1234 Packing, 3/8" - Teflon 19b CVS-A-0959 Packing, 1/2" - Buna 1

CVS-A-1012 Packing, 1/2" - Teflon 19c CVS-A-2771 Packing, 3/4" - Buna 1

CVS-A-2988 Packing, 3/4" - Teflon 19d CVS-A-0050 Packing, 1" - Buna 1

CVS-A-1013 Packing, 1" - Teflon 110 CVS-A-1463 Series 50 - Plunger Packing Gland, 1/4" 1

10a CVS-A-0957 Series 50 - Plunger Packing Gland, 3/8" 110b CVS-A-1219 Series 50 - Plunger Packing Gland, 1/2" 110c CVS-A-2769 Series 50 - Plunger Packing Gland, 3/4" 110d CVS-A-0043 Series 50 - Plunger Packing Gland, 1" 111 CVS-A-2097 Top o-ring 112 CVS-A-2338 Gasket 113 CVS-A-2350 Gasket 314 CVS-A-2764 Series 50 - Plunger, 1/4" 1

14a CVS-A-0743 Series 50 - Plunger, 3/8" 114b CVS-A-0032 Series 50 - Plunger, 1/2" 114c CVS-A-2767 Series 50 - Plunger, 3/4" 114d CVS-A-0158 Series 50 - Plunger, 1" 115 CVS-A-3523 Retainer Ring (.39" ID) 116 CVS-B-0368 Series 50 - Top Check Valve Seat 117 CVS-B-0368 Series 50 - Bottom Check Valve Seat, 1/4" 1

Series 50 - Bottom Check Valve Seat, 3/8" 117a CVS-B-0698 Series 50 - Bottom Check Valve Seat, 1/2" - 1" 118 CVS-C-1608 Series 50 - Pump Head, 1/4" Stem 1

18a CVS-C-0084 Series 50 - Pump Head, 3/8" Stem 118b CVS-C-0022 Series 50 - Pump Head, 1/2" Stem 118c CVS-C-0333 Series 50 - Pump Head, 3/4" Stem 118d CVS-C-0020 Series 50 - Pump Head, 1" Stem 119 CVS-A-0444 Series 50 - Ball Cage 1

Item Number Part Number Description Qty.20 CVS-A-0559 Series 50 - Body, Grease Jack 121 CVS-A-0560 1/2" Hex Bolt 122 CVS-A-0562 Series 50 - Retainer, Grease Jack 123 CVS-A-0564 Ball, 316SS 1

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CVS Series 50 Chemical Injection Pump – Technical Data: Volume

Minimum Operating Speed Continuous Service

Maximum Operating Speed

Minimum Operating Speed Continuous Service

Maximum Operating Speed

1-1/4” Plunger Long Stroke

1” Plunger Long Stroke

1-1/4” Plunger Short Stroke 3/4 “ Plunger Long Stroke

1” Plunger Short Stroke

3/4 “ Plunger Short Stroke (1/2” Stroke Length)

1/2" Plunger Long Stroke (1-1/4” Stroke Length)

3/8” Plunger Long Stroke

1/4" Plunger Long Stroke 1/2" Plunger Short Stroke 3/8” Plunger Short Stroke 1/4" Plunger Short Stroke

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Dimensions - Inches

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Head Office 3900 101 Street Edmonton, Alberta T6E 0A5 Canada Office: (780) 437-3055 Fax: (780) 436 5461

Calgary Sales Office 205, 2323 – 32 Avenue NE Calgary, Alberta T2E 6Z3 Canada Office: (403) 250-1416 Fax: (403) 291-9487

Website: www.cvs-controls.com Email: info@cvs-controls.com

CVS Controls Ltd. strives for the highest levels of quality and accuracy. The information included in this publication is presented for informational purposes only. CVS Controls Ltd. reserves the right to modify or change, and improve design, process, and specifications without written notice. Under no circumstance is the information contained to be interpreted to be a guarantee/warranty with regard to our products or services, applicability or use.

Selection, use and maintenance are the sole responsibility of the end user and purchaser. CVS Controls assumes no liability for the selection use and maintenance of any product.

Rev 2 Oct/13

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